EP2047529A1 - Elektronische steuerungseinrichtung für einen als trimorph ausgebildeten piezokeramischen biegewandler - Google Patents
Elektronische steuerungseinrichtung für einen als trimorph ausgebildeten piezokeramischen biegewandlerInfo
- Publication number
- EP2047529A1 EP2047529A1 EP07801614A EP07801614A EP2047529A1 EP 2047529 A1 EP2047529 A1 EP 2047529A1 EP 07801614 A EP07801614 A EP 07801614A EP 07801614 A EP07801614 A EP 07801614A EP 2047529 A1 EP2047529 A1 EP 2047529A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control device
- resistance
- voltage
- piezoceramic
- trimorph
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 24
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
Definitions
- the invention relates to an electronic control device for a trained as Trimorph piezoceramic bending transducer, which consists of two piezoceramic plates with interposed passive intermediate layer.
- a voltage source is applied to the first piezoceramic plate in such a trimorph for mechanical bending in one direction and a voltage source to the other piezoceramic plate for mechanical bending in the other direction.
- a voltage source is also possible to apply the voltage of the voltage source either to the one or to the other piezoceramic plate by means of corresponding switching means. In all cases, the other piezoceramic plate is passive.
- the two first resistance branches of the two voltage dividers expediently each have the series connection of a diode with a resistance element.
- a Zener diode which forms an additional protection against overvoltages.
- the diode and the Zener diode are each polarized in opposite directions.
- the cathodes of the two diodes of the two first resistance branches are connected to one another directly or indirectly, that is, for example, via a resistor.
- another resistance element can be connected in each case between the first resistance branches and the piezo ceramic plates.
- the second voltage divider can be connected to a second voltage source, wherein the voltage sources can be switched on as an alternative to generating the two opposing bending movements.
- the first voltage source may also be switchable to the first or the second voltage divider, for example by means of a changeover switch, so that only a single voltage source is required even in bending movements in both directions.
- the trimorph is particularly suitable as a valve switching element of a valve.
- the required electronic components can be arranged expediently on a flexible conductor of the valve, such a flexible conductor is often present anyway.
- FIG. 1 shows the circuit diagram of a first exemplary embodiment
- FIG. 2 shows a voltage diagram for explaining the mode of action
- Figure 3 shows the circuit diagram of a second embodiment of the invention and 4 shows a voltage diagram for explaining the operation of the embodiment shown in Figure 3.
- the piezoceramic bending transducer shown schematically in FIG. 1, designed as a trimorph 10, consists in a known manner of two piezoceramic plates 11, 12, between which a passive intermediate layer 13 is arranged.
- the carrier material of the intermediate layer 13 is usually glued to the piezoceramic plates 11, 12 or otherwise fixed thereto.
- the trimorph 10 has three electrical connections 14-16.
- a first voltage divider 17 has two resistance branches 18, 19, wherein the first resistance branch 18 consists of the series circuit of a resistive element 20 with a diode 21 and the second resistance branch 19 of a resistive element 22.
- Other known embodiments of voltage dividers 17 are also possible in principle.
- the tap of the voltage divider 17 between the resistor branches 18, 19 is connected via the electrical connection 16 with the passive intermediate layer 13.
- the other terminal end of the first resistance branch 18 is connected to the first piezoceramic plate 11 via a further resistance element 23 and via the electrical connection 14.
- a second voltage divider 24 again consists of two
- the entire assembly may be disposed in a fluidic valve 29, with the trimorph 10 forming the valve member.
- the electronic components can be integrated, for example, on a frequently already existing flex conductor of the valve 29, as is known from EP 1717500 Al lo. If the trimorph 10 is to perform only one bending operation in the one bending direction, then only one voltage source Usti has to be applied to the first voltage divider 17.
- the voltage ratios are shown in the left half of the diagram of the diagram shown in FIG. 2.
- the voltage Uci is the voltage between the first piezoceramic plate 11 and the intermediate layer 13, while the voltage Uc2 shown in dashed lines in opposite directions is the voltage between the second piezoceramic plate 12 and the intermediate layer 13. Both voltages Uci and Uc2 will be
- the bending movement of the trimorph 10 in a design as a valve member is required, for example, in a designed as a 3/2 way valve fluidic valve 29, while in a 2/2 way valve only a bending movement in a bending direction is necessary.
- a modified first voltage divider 17 ' instead of the first resistance branch 18, a modified first resistance branch 18', which has a Zener diode 30 instead of the resistance element 20, occurs. Accordingly, a modified first resistance branch 25 'of the second modified voltage divider 24' has a Zener diode 31.
- the Zener diodes 30, 31 provide additional protection against overvoltages.
- the voltages Uci and Uc2 are in both Biegerungen limited to 200 V, this value is of course only exemplary.
- the piezoceramic plate which exerts a respective compressive stress is kept constant up to a voltage of 200 V of the voltage source Usti or Ust2 and then drops to a value of -50 V. This means that the piezoceramic plate exerting a compressive stress is activated in each case only at voltages above 200 V in order to support the movement.
- the voltage ratios can be adjusted in the desired manner.
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrophonic Musical Instruments (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/007119 WO2009021530A1 (de) | 2007-08-11 | 2007-08-11 | Elektronische steuerungseinrichtung für einen als trimorph ausgebildeten piezokeramischen biegewandler |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2047529A1 true EP2047529A1 (de) | 2009-04-15 |
EP2047529B1 EP2047529B1 (de) | 2010-07-21 |
Family
ID=39276203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07801614A Not-in-force EP2047529B1 (de) | 2007-08-11 | 2007-08-11 | Elektronische Steuerungseinheit für einen als Trimorph ausgebildeten piezokeramischen Biegewandler |
Country Status (6)
Country | Link |
---|---|
US (1) | US8053949B2 (de) |
EP (1) | EP2047529B1 (de) |
CN (1) | CN101501877B (de) |
AT (1) | ATE475202T1 (de) |
DE (1) | DE502007004503D1 (de) |
WO (1) | WO2009021530A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9537322B2 (en) | 2011-05-27 | 2017-01-03 | uBeam Inc. | Sub-apertures with interleaved transmit elements for wireless power transfer |
US9831920B2 (en) | 2011-05-27 | 2017-11-28 | uBeam Inc. | Motion prediction for wireless power transfer |
US9722671B2 (en) | 2011-05-27 | 2017-08-01 | uBeam Inc. | Oscillator circuits for wireless power transfer |
US10148131B2 (en) | 2011-05-27 | 2018-12-04 | uBeam Inc. | Power density control for wireless power transfer |
US9819399B2 (en) | 2011-05-27 | 2017-11-14 | uBeam Inc. | Beam interaction control for wireless power transfer |
US9214151B2 (en) | 2011-05-27 | 2015-12-15 | uBeam Inc. | Receiver controller for wireless power transfer |
DE102012012183B4 (de) | 2012-06-19 | 2014-04-03 | Festo Ag & Co. Kg | Piezokeramischer Biegewandler und Verfahren zum Betreiben eines piezokeramischen Biegewandlers |
US9242272B2 (en) * | 2013-03-15 | 2016-01-26 | uBeam Inc. | Ultrasonic driver |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4099211A (en) * | 1976-09-13 | 1978-07-04 | Ampex Corporation | Positionable transducing mounting structure and driving system therefor |
JPS59108378A (ja) | 1982-12-14 | 1984-06-22 | Omron Tateisi Electronics Co | 圧電バイモルフの駆動方法 |
WO1989007345A1 (en) * | 1988-02-08 | 1989-08-10 | Pacific Bell | Improved piezoelectric relay element and method for driving the same |
US4916349A (en) * | 1988-05-10 | 1990-04-10 | Pacific Bell | Latching piezoelectric relay |
US5825117A (en) | 1996-03-26 | 1998-10-20 | Hewlett-Packard Company | Second harmonic imaging transducers |
JPH1168507A (ja) * | 1997-08-08 | 1999-03-09 | Nec Corp | チップ型圧電フィルタ及び該圧電フィルタを用いた濾波回路 |
US6060813A (en) * | 1998-01-08 | 2000-05-09 | Xerox Corporation | Vibration suppression and electromechanical damping apparatus for electrophotographic printing structures |
US7098577B2 (en) * | 2002-10-21 | 2006-08-29 | Hrl Laboratories, Llc | Piezoelectric switch for tunable electronic components |
JP4449978B2 (ja) * | 2004-03-30 | 2010-04-14 | 株式会社村田製作所 | 力学量センサ |
ATE369513T1 (de) | 2005-04-28 | 2007-08-15 | Festo Ag & Co | Piezo-biegewandler |
-
2007
- 2007-08-11 WO PCT/EP2007/007119 patent/WO2009021530A1/de active Application Filing
- 2007-08-11 CN CN2007800261014A patent/CN101501877B/zh not_active Expired - Fee Related
- 2007-08-11 AT AT07801614T patent/ATE475202T1/de active
- 2007-08-11 DE DE502007004503T patent/DE502007004503D1/de active Active
- 2007-08-11 US US12/310,060 patent/US8053949B2/en not_active Expired - Fee Related
- 2007-08-11 EP EP07801614A patent/EP2047529B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009021530A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2047529B1 (de) | 2010-07-21 |
WO2009021530A1 (de) | 2009-02-19 |
ATE475202T1 (de) | 2010-08-15 |
US20110163631A1 (en) | 2011-07-07 |
CN101501877A (zh) | 2009-08-05 |
US8053949B2 (en) | 2011-11-08 |
CN101501877B (zh) | 2012-04-25 |
DE502007004503D1 (de) | 2010-09-02 |
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